Sanitary catch basin



Jan. 3, 1928;

. INVENTOR l Lahr/ence G'rfz.

ATroRNaYs JE/111559,. Il.

/ig BY t L. GRIFFITH SANITARY CATCH BASIN Filed March 26, 1925 ril Patented Jan. 3, 1928.

LAWRENCE GRIFFITH, OF YONKERS, NEW YORK.

SANITARY CATCH BASIN.

Application filed March 26, 1925.

This invention relates to improvements in catch basins designed to receive surface water drainage and to lead it into a sewer.

One of the main objects of the invention is to provide a means whereby a water s eal will be formed between the sewer connection to the catch basin and the inlet through which the water flows from the catch basin to the sewer connection. The purpose of this is to at all times preventa back-flow of sewer gas into the catch basin.

Another object. of the invention is to provide means whereby the sewer connection may be located at a comparatively low level while the outflow from the catch basin may he arranged at a much higher level. The purpose of this is to increase the sediment capacity of the catch basin.

A. further object of the invention is to provide a box-like casing, preferably of cast iron, adapted to be placed in the wall of the catch basin, the trap and water seal being within the casing so that said water seal will be maintained at all times to prevent a backflow of sewer gas, regardless of the level of the water in the catch basin.

There are other important objects and advantages of the invent-ion which will appear hereinafter.

In the drawing:

Fig. 1 is a vertical section through a catch basin showing my invention in applied posi` tion;

Fig. 2 a horizontal section through the basin showing the trap in plan;

Fig. 3 a vertical section through the trap on a larger scale taken on the line SH3 of Fig. 1;

Fig. 4 is a vertical section taken on the line 4 4 of Fig. 3; and

Fig. 5 a perspective view of the trap.

Referring to the parts by numerals 1 designates a receiving basin of standard form located beneath a street gutter and sidewalk. The surface water drains into the basin through a. grating 2 in the gutter and the basin may be entered by a workman and cleaned through a manhole 3. The basin is walled with any suitable material such as brick 4. The usual inclined drain pipe 5 leads from one side of the basin to the sewer and constitutes its outlet. In practice it has been found necessary to locate the pipe 5 at a depth of at least three feet below the street surface in order to protect it and Serial No. 18,454.

prevent its being broken by the shockiand vibration caused by the street traliic.

My improved trap is in the form of a boxlil'rc casing 6 adapted to be built into the wall of the basin over the basin outlet or pipe The lower portion of the casing 6 formed to provide a trap well the depth of which is determined by an outlet opening T through the rear or outer side of the casing. The casing is formed with a flange 8 surrounding the opening T, to which fiange the pipe 5 is joined. The upper portion of the casing iscentrally divided by a vertical partition 9 to thereby form an inlet chamber l() and an outlet chamliier 11 within the casing above the water in the well. The part-ition 9 extends downwardly to a substantial depth below the highest water level as determined by the lowest part of the outlet 7. The portion of the casing 6 enclosing the inlet chamber l() extends considerably above the portion enclosing the outlet chamber 11 and formed adjacent its upper end with an inlet openng 12 communicating with the inlet chamber. This opening 1Q, is formed in the front side or inner wall ofthe casing.

The inlet and outlet chambers are located side by side within the casing 6 and the casing is adapted to be mounted within the basin wall 4 with the plane of the two chambers disposed transversely to the direction of the basin outlet 5. The inlet opening 12 of the casing is therefore laterally offset from the outlet opening 7. This offset position of the inlet 1:2 provides clearance upon the front face of the casing for an observation and cleaning opening 13 formed in the inner wall of the casing in alinement with the out-let 7 at the rear thereof. This observation opening is normally closed b v a slidable doorll which isguded between guides 15 formed on the casing. The casing is formed with a seat 16 for the door. .surrounding the opening 13, and both the seat and the guides 15 are inclined slightly from the vertical. The door is adapted to be drawn upwardly to uncover the opening and its upward movement is limited by suitable stops 17 and 1S on the door and the guides, respectively. lVhen the door is released it gravitates to closed position and its weight holds it against the inclined seat 16 to seal the opening 13. The stops prevent the door from being entirely removed and displaced.

The inlet 12 is located a material dis-- lll) tance above the level of the outlet 7 and is covered exteriorly of the casing by a battle hood 19 formed on the front of the casing. This hood extends across the opening and its lower end extends a sutable distance below the opening. As previously stated, the basin outlet pipe 5 is located approximately three feet below the street surface and it is the practice at present to cover the outlet merely with a battle hood similar to the hood 19. The outlet therefore remains unsealed until the water and sediment rise to the level of the battle` and sewer gas is tree to escape into the basin. lVhen the workman removes the sediment. from the basin he is required to remove the battle hood and examine the outlet pipe 5 to make sure that it is not clogged. Frequently he fails to replace the battle hood and as a consequence the outlet remains permanent-ly unsealed or else clogs with matter which the battle is intended to exclude. It will be seen also that the capacity of the basin is limited to the level determined by the height of the outlet 5, or of the battle covering it. When the sediment rises to this level it is necessary to clean the basin to prevent the sediment 'trom sealing the outlet and causing the basin to overflow. The large space Within the basin above the outlet is theretore wasted, as the sediment must not be allowed to rise above that point.

By locating the casing inlet 12 a considerable distance above the basin outlet, the sediment capacity ot' the basin is greatly increased as will be seen in Fig. 1 of the drawing. lVhen the water rises to the level of the opening 12 floating matter, such as sticks and the like, is prevented from passing into the casing b v the batlle 19 which prevents a direct lateral tlow t'rom the surtace oi? the water to the inlet 12. It is necessary to clean the basin only when the sediment rises to the lower edge ot the baille 19. The capacity of the basin is thus greatly increased.

The trap well in the bottom ot the casing remains permanently tilled with water which seals communication between the ontletvand inlet below the partition 9 and prevents a back-flow ot gas at all times. regardless ot the Water level in the basin. The pipe .'i and the trap are rendered readily accessible t'or inspection by the door 14. lVhen the door is raised the pipe may be viewed directly through the observation opening. rl`his opening is preferably ot material size in order to admit light and to permit cleaning of the trap well through it. The tall ot Water into the trap well from the elevated inlet 12 agitates the water in the well and tends to prevent any dangerous accuniulation ot' sediment therein. It will be understood that the form of closure for the observatitm opening, as Well as certain other details, may

be varied without departing from the spirit ot the invention.

that l claim is:

l. A device ot the class set iorth comprising a casing torming a water trap well, an outlet 'for said well at one side of the casing and spaced above the bottoni ot the well to lctcrmine th(` water level therein, the casing having an observation and cleaning opening in its opposite sde located in alinenicnt with said outlet and at the saine level, a movable closure 'l'or said opening, an inlet to:- said well above said a er level and laterally otl'set trom the outlet, and means separating tbc inlet trom the outlet within the casing above the water 'level therein and tor a depth below sad level, whereby when the trap well contains water up to the water liv-:el it will torni a water seal between said iule and :said outlet.

deviceol the class set torth coniprising a box-like casing adapted to be built into the wall ot' a catch basin and 'i'orn'iing an enclosed water trap well at its lower portion, an outlet for sa'd well through the outer wall oi" the casing and .spaced air-ove the bottom ot the well to dctermine the water level therein, the casing having an observation and cleaning opening in its inner wall in alinement with said outlet and at the saine level, a movable closure for said openng, an inletfor said well through the inner wall of the casing located a material distance above the level ot the outlet and observation'openings and later-i ally ott'set trom the outlet and above the out let. a bood-like battle nieans connected to the inner wall ot' the casing and extending across the inlet and below it to prevent a direct lateral flow ot water from the catch basin into said jnlet, and means separating the inlet and outlet' within the casing above the said. water level therein and for a depth .below the water level whereby water in said well will t'orn'i a water sealvbetween the inlet andthe outlet.

Il. A device ot' the class set torth comprising a casing lorn'iing a water well, an outlet tor said well at one side ot the casing, tbe casing having an observation opening in its opposite side located in alinernent willi the said outlet and at the saine level. a movable closure for said opening, an inlet tor said well above the outlet and observation opening, and a bood-like baille means connected to the inner wall of the casing above the observation ripening and extending across the inlet and below the lower margin otl the inlet to prevent a direct lateral How ot Water from the catch bas`n into sai-.fl inlet and to torni a Water seal between the interior ot the catch basin and the outlet openiiig.

In testimony \'.hei.'eoiu l hereunto attix in v signature.

LAVRENCE GRF FlTll.

Sii 

